[Immunogenetics of celiac disease]

Area of Science:

• Immunology
• Genetics
• Gastroenterology

Context:

• Celiac disease is an autoimmune disorder affecting the small intestine.
• It is strongly associated with specific human leucocyte antigen (HLA) alleles, particularly HLA-DQ2 and HLA-DQ8.
• The prevalence is approximately 1% in European and North American populations.

Purpose:

• To explore the genetic underpinnings of celiac disease beyond established HLA associations.
• To understand the role of other genetic factors contributing to the remaining 60% of disease risk.
• To integrate recent immunological and genetic findings in celiac disease research.

Summary:

• Celiac disease pathogenesis involves specific HLA class II molecules (HLA-DQ2/DQ8), but these account for only 40% of the genetic risk.
• Immunological studies have identified gluten epitopes and the role of tissue transglutaminase in antigen presentation.
• Genome-wide association studies (GWAS) are identifying additional susceptibility genes involved in immune response, though results can be complex and sometimes contradictory.

Impact:

• Advances understanding of celiac disease's complex genetic architecture.
• Identifies potential new targets for diagnosis and therapy.
• Highlights the intricate interplay between genetics and immune response in autoimmune diseases.